In addition, the following mother’s and child’s characteristics impacted positively (breastfeeding, the presence of electricity and water at home) or negatively (multiple births, chronic pathologies, anemia, CD4 count < 25%, unemployed mother, developmental delay, presence of systemic clinical signs during the visit, SGAG, diarrhea, secondary and primary education level of the mother) WAZ evolution. Here, CD4 is linked to anemia (phenotype).